Pencil-sharpener.



F. E. HINER.

Patented. Apr. 5, 1910.

2 SHBETB B HBBT 1.

ANDREW a GRAHAM cm PHDTO-UIHOGRAFNERS, WASWNGTON: mV 0.

F. E. INER PENCIL SHARPENER. APPLICATION FILED APR. 8, 1909.

Patented Apr. 5, 1910.

ANDREW u mum um Plww-umosmrumwnsmvemm u c UNITED STATES PATENT OFFICE.

FRANK E. I-IINER, OF ROCKFORD, ILLINOIS, ASSIGNOR OF ONE-HALF T0 E. W.BUNKER, OF SPOONER, WISCONSIN.

PENCIL-SHARPENER.

To all whom it may concern:

Be it known that I, FRANK E. HINER, a citizen of the United States,residing at Rockford, in the county of Winnebago and State of Illinois,have invented certain new and useful Improvements in Pencil-Sharpeners;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in pencil sharpeners.

The object of the invention is to provide a pencil sharpener having animproved construction of knife and means for operating the same.

A further object is to provide a pencil sharpener by means of which boththe wood and the lead of the pencil may be evenly sharpened withoutdanger of breaking off the lead point.

lVith the foregoing and other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts, as will be more fully described and particularly pointed out inthe appended claims.

In the accompanying drawings, Figure 1 is a plan view of a pencilsharpener constructed in accordance with the invention; Fig. 2is asimilar view of the inner side of the cover portion of the sharpener,showing the construction and arrangement of the operatin mechanism andillustratin the p0sition of the knife and its connected parts, at thebeginning of the stroke; Fig. 3 is a similar view showing the positionof the knife at the end of the stroke; Fig. 4: is a side or edge view ofthe sharpener; Fig. 5 is a vertical sectional View on the line 5-5 ofFig. 1 with parts omitted for clearness; Fig. 6 is a detail sectionalview on the line 66 of Fig. 2; Fig. 7 is a detail view of the inner sideof the knife carriage showing the chuck operating pawl.

In the embodiment of the invention, I provide a casing 1 which may be ofany suitable shape but which is here shown and is preferably cylindricalin form and consists of a body portion 2 and a flanged cover section 3,which is removablyengaged with the body portion and is secured in placethereon by means of studs 4 arranged on the Specification of LettersPatent.

Application filed April 8, 1909.

Patented Apr. 5,1910.

Serial No. 488,667.

outer side of the body portion and which are adapted to be engaged withbayonet slots 5 formed in the flange of the cover portion whereby thelatter is locked into engagement:1 with the body portion as will beunderstoo On the outer side of the cover portion 1 is I arranged apencil holding socket 6, the outer end of which is reduced to form apoint receiving recess 7. The inner side of the outer end of the socket6 is formed at an angle and is open and communicates with an opening inthe side of the top or cover section whereby when a pencil is insertedin the socket end, the same will project a slight distance beyond theinner wall of the top in position to be engaged with the sharpeningmechanism hereinafter described. The socket 6 may be of any suitableconstruction but is here shown and is preferably constructed of sheetmetal, riveted or otherwise secured to the outer side of the cover.

On the outer side of the top or cover of the casing and spaced from theinner end of the socket 6 is riveted or otherwise secured a bearingbracket 8 in which is revolubly mounted a pencil rotating mechanismcomprising a sleeve 9 having on its upper end an annular flange 10 towhich is secured inwardly projecting spring fingers 11 which are adaptedto grip and hold a pencil when inserted in the sleeve. On the sleeve,between the flange 10 and the bracket 8, is arranged an annular seriesof spur gear teeth 12 with which is adapted to be engaged a suitablerotating mechanism hereinafter described. Secured to the outer side ofthe cover section and in engagement with the teeth 12 is a holdingspring 13 which controls the movement of the sleeve and prevents thesame from being turned more than one tooth at each stroke of the knife.The pencil rotating mechanism is held in operative position in thebracket 8 by means of a spring retaining rod 1 1 which is secured to theouter side of the cover' above the gear teeth 12, as shown. In the outerside of the cover, opposite to the pencil rotating mechanism is formedan aperture 15 through which the teeth 12 project and are engaged by theoperating mechanism of the knife.

On the inner side of the cover section 3 is pivotally mounted in anysuitable manner a knife carriage 16 which is here shown and ispreferably in the form of a plate having on its free end a bevel finger17 which is adapted to engage a guide passage formed by a segmentalguide plate 18 secured to the inner side of the cover 3, adjacent to oneedge thereof as shown. Between the guide plate 18 and the adjacent innerwall of the cover section is arranged a tension spring 19 which is bentdownwardly at one end, as shown at 20, whereby the finger 17 in movingin one direction will pass over the spring and between the same and theplate 18, while in its return movement, the beveled edge of the fingerwill engage beneath the opposite edge of the spring, thus elevating thesame so that in its return movement, the finger 17 will pass beneath thespring. By this construction, the pressure of the spring is brought tobear upon the finger when moved in either direction.

The knife carriage or plate 16 is provided with an inclined seat 21 onwhich is secured a knife 22, said knife being preferably in the form ofa disk having its outer edge beveled or sharpened so that when broughtinto engagement with the end of the pencil which projects through theopening in the end of the socket and side of the cover, it will shaveoff a chip each time the knife is reciprocated. The knife 22 ispreferably secured to the inclined seat of the carriage by means of aclamping screw 23 whereby the knife may be turned on its seat to bringdifferent parts of the edge of the knife into operative position so thatwhen one portion of the edge becomes dull, the blade may be turned tobring another portion into position.

Revolubly mounted in the cover portion 8 is a short knife operatingshaft 24: on the outer end of which is secured an operating crank handle25 and on the inner end of which is fixedly mounted a crank 26 which isconnected by a pitman rod 27 to the knife carriage 16 whereby when saidshaft is revolved by the handle, the knife carriage will be oscillatedto carry the knife back and forth over the inner side of the cover, thusshaving off the end of the pencil.

Pivotally mounted on the inner side of the inclined knife seat 21 of thecarriage 16 is a pawl 28 which is adapted to be brought into engagementwith the teeth 12 on the pencil rotating mechanism each time the knifecarriage is reciprocated thereby turning said pencil rotating mechanismto the distance of one tooth, immediately before each stroke of theknife. The pawl 28 is provided with a spring 29 adapted to restore thepawl to operating position each time it engages the teeth 12 of thepencil rotating mechanism and said pawl is also provided with a stop lug30 whereby the same is held in operative position to engage the teeth12.

In the operation of the sharpener, the end of the pencil is inserted inthe socket 6 so that a portion of the end projects through the openingsin the socket and side of the cover section after which the handle 25 isrevolved, thus oscillating the knife carriage in the manner hereinbeforedescribed to bring the edge of the knife into engagement with theprojecting portion of the pencil, thus severing a chip or shaving eachtime the knife is brought into engagement with the pencil. By means ofthe pawl 28 carried by the knife carriage, the pencil rotating mechanismis actuated to turn the pencil to the distance of one tooth before eachstroke of the knife, so that a fresh surface of the pencil is broughtinto posi tion to be cut at each stroke of the cutting mechanism.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention, as defined in theappended claims.

Having thus described my invention, what I claim is:

1. In a pencil sharpener, a casing, a pencil holder on said casing, apencil rotating mechanism, a knife carriage in said casing, a knifemounted on said carriage, means to actuate the latter, means carried bysaid carriage to operate said pencil rotating mechanism at each strokethereof, and means to raise the carriage in its retrograde movementwhereby the knife will be raised from cutting position.

2. In a pencil sharpener, a casing, a pencil holding socket arranged 011said casing, a pencil rotating mechanism, a knife carriage pivotallymounted on the inner side of the casing, a guiding and tension mechanismengaged by the free end of said knife carriage, a knife adjustablymounted on the carriage and adapted to be brought into engagement with apencil inserted in said socket, means arranged on said knife carriage toengage the pencil rotating mechanism and to actuate the same to turn thepencil at each stroke of the knife, and means for actuating the knifecarriage.

3. In a pencil sharpener, a casing comprising a body portion, a coversection engaged with said body portion, means to lock the cover sectiononto said body portion, a pencil holding socket arranged on said coversection, a pencil rotating mechanism mount ed on the cover section andcomprising a revolubly mounted sleeve, an annular series of gear teethon said sleeve, means to retard the movement of the rotating mechanism,a

knife carriage pivotally mounted on the in- I rotating mechanism at eachstroke of the knife, means for actuating the knife carriage, and meansto raise the carriage in its retrograde movement whereby the knife willbe raised from cutting position.

at. In a pencil sharpener, a casing, a pencil socket arranged on saidcasing to hold a pencil in position for sharpening, a pencil rotatingmechanism, a knife carriage comprising a plate pivotally mounted at oneend in said casing, guiding and tension mechanism engaged by the freeend of said plate, an operating shaft, a handle secured to one end ofsaid shaft, a cranksecured to the opposite end within said casing, apitman rod to connect said crank with said plate, and a knife carried bysaid plate and adapted to be brought into successive engagement with theend of the pencil in said holding mechanism.

5. In a pencil sharpener, a casing, a pencil holding socket arranged onsaid casing to hold the pencil in position for sharpening, means forrotating the pencil while being sharpened, a knife carriage operativelymounted in said casing, means to actuate said carriage, a guide platearranged in the casing, a tension spring to oo-act with said guide platefor guiding the carriage in its movement, a knife carried by saidcarriage, said knife comprising a circular disk having a continuouscutting edge, and a clamping screw adapted to detachably secure saidknife to the carriage whereby the former may be turned to bringdifferent portions of the edge into operative position.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

FRANK E. HINER. Witnesses:

E. C. STOHBURGER, ALICE R. SHONE.

